Continuously worrying about anything and everything is more debilitating to your health than most other factors you can control.
JMO
Not just your opinion, for it is shared by many including my bride and me.
Throughout modern Western life as we read it in media, there seem two basic themes: "Fear!" And "fear not." We ascribe to the latter.
One famous medical researcher has claimed that the introduction of MRI scanning has caused untold mischief (in addition to being overused) in that it often detects clinically insignificant abnormalities (incidentalomas) which often lead to further tests and unnecessary treatments.